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Finding the Fourth Proportional to 570,855.50, 787,771.56 and 312,730.26

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Solution

The fourth proportional to 570,855.50, 787,771.56 and 312,730.26 is: 431,562.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,855.50 : 787,771.56 = 312,730.26 : x
  2. Step 2: Convert to fraction form
    570,855.50/787,771.56 = 312,730.26/x
  3. Step 3: Cross multiply
    570,855.50x = 787,771.56 × 312,730.26
  4. Step 4: Simplify right side
    570,855.50x = 246,360,003,215.75
  5. Step 5: Solve for x
    x = 246,360,003,215.75/570,855.50
  6. Step 6: Final answer
    x = 431,562.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.